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<p>Hello,</p>
<p>No farfield grid has been created with the .geo file (see .png
file and .geo file) (I've used Mesh/Define/2D). However the
farfield is created if commands relative to the boundary layer are
in comments. But perhaps it is a question of gmsh version (2.13.0)
?</p>
<p>Remark : when I save the grid containing only the boundary layer
into a .p3d file, this .p3d file is empty. that means that the
grid is not a "ijk structured" grid.</p>
<p>In the NACA0012 .geo file, I create a "hybrid" grid (eg
unstructured+ijk structured) without using boundary layer gmsh
capability. I save the grid both into a .p3d file (then only the
structured part is saved), and into a .msh file (then all the grid
is considered as unstructured). To have only the farfield grid, I
comment lines concerning the structured part and I save the grid
into .msh file. A preprocessing outside gmsh is necessary to
identify connections between both grids.<br>
</p>
<p>Marie-Claire <br>
</p>
<br>
<div class="moz-cite-prefix">Le 24/02/2018 à 11:15, Christophe
Geuzaine a écrit :<br>
</div>
<blockquote
cite="mid:7FF3FBCA-48CE-441E-BF50-D44863EE5012@uliege.be"
type="cite">
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<div class="">On 23 Feb 2018, at 09:28, Tommaso Pascon <<a
moz-do-not-send="true"
href="mailto:pascon.tommaso@yahoo.it" class="">pascon.tommaso@yahoo.it</a>>
wrote:</div>
<br class="Apple-interchange-newline">
<div class="">
<div class="">
<div id="edo-message" class="">Good morning,</div>
<div id="edo-message" class=""><br class="">
</div>
<div id="edo-message" class="">I'm Tommaso Pascon a
Openfoam CFD user who use Gmsh as a mesh generator
software.</div>
<div id="edo-message" class=""><br class="">
</div>
<div id="edo-message" class=""><span class="">I'm having
troubles trying to get an hybrid mesh with a
structured boundary layer area around a bluff body and
an unstructured region for the rest of my domain.<br
class="">
<br class="">
</span></div>
</div>
</div>
</blockquote>
<div><br class="">
</div>
<div>See e.g. <a moz-do-not-send="true"
href="https://gitlab.onelab.info/gmsh/gmsh/blob/master/benchmarks/2d/BL2.geo"
class="">https://gitlab.onelab.info/gmsh/gmsh/blob/master/benchmarks/2d/BL2.geo</a></div>
<div><br class="">
</div>
<br class="">
<blockquote type="cite" class="">
<div class="">
<div class="">
<div id="edo-message" class=""><span class="">I tried with
boudarylayer field but i can't make it to work
apparently so i decided to use the extrusion function.
This is working but i can't connect the structured
region with the unstructured one. It seems that these
two aren't connected together and the unstructured
mesh falls into the structured part.<br class="">
<br class="">
What am I missing? I've read a lot of posts on that
matter but I still can't find a solution.<br class="">
If it's needed I can upload the geo file<br class="">
<br class="">
Thanks</span></div>
<div id="edo-message" class=""><br class="">
</div>
<div id="edo-message" class="">
<table id="post682442" class="tborder
vbseo_like_postbit" width="100%">
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<tr class="">
</tr>
<tr class="">
<td colspan="2" class="alt1" id="td_post_682442"><br>
</td>
</tr>
<tr class="">
<td class="alt2"><span class="">Tommaso Pascon <br
class="">
</span><br class="">
</td>
</tr>
</tbody>
</table>
</div>
</div>
_______________________________________________<br class="">
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</blockquote>
</div>
<br class="">
<div class="">
<div dir="auto" class="">
<div>— </div>
<div>Prof. Christophe Geuzaine<br class="">
University of Liege, Electrical Engineering and Computer
Science <br class="">
<a moz-do-not-send="true"
href="http://www.montefiore.ulg.ac.be/%7Egeuzaine"
class="">http://www.montefiore.ulg.ac.be/~geuzaine</a><br
class="">
<br class="">
Free
software: <a class="moz-txt-link-freetext" href="http://gmsh.info">http://gmsh.info</a> | <a class="moz-txt-link-freetext" href="http://getdp.info">http://getdp.info</a> | <a class="moz-txt-link-freetext" href="http://onelab.info">http://onelab.info</a></div>
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